摘要
以硬脂酸丁酯为芯材,苯乙烯马来酸酐共聚物(SMA)为乳化分散剂,采用界面聚合制备双层微胶囊相变材料,其外壳体为甲苯-2,4-二异氰酸酯(TDI)和二乙烯三胺(DETA)反应形成的聚脲壳层,内壳体为TDI与聚丙二醇2000(PPG2000)反应形成的聚氨酯壳层。采用差示扫描量热仪(DSC)、热重分析仪(TGA)、扫描电镜(SEM)、光学显微镜等分别对微胶囊的热性能、表面形态做了研究和分析。结果表明,所制备的双层微胶囊表面光滑致密,相变温度24.1℃,相变热85 J/g。所制备双层微胶囊的致密性和耐热稳定性均比单层微胶囊有很大程度的提高。
Double-shell microcapsules containing butyl stearate were prepared by interfacial polymerization.The outer shell is polyurea formed by polymerization of toluene-2,4-diisocyanate（TDI） and diethylene triamine（DETA）,the inner shell is polyurethane formed by polymerization of TDI and polypropylene glycol 2000（PPG2000）.Styrene maleic anhydride copolymer（SMA） was used as emulsifier.The thermal properties,surface morphologies of microcapsules were investigated by differential scanning calorimetry（DSC）,thermogravimetric analysis（TGA）,scanning electron microscope（SEM） and optical microscope,respectively.The results indicate that the surface of the prepared double-shell microPCMs is smooth and compact,and the microPCMs have an phase change temperature of 24.1 ℃ and phase change heat of 85 J/g.The compactness and stabilities of the double-shell microcapsule are obviously improved compared with that of single-shell microcapsule.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2011年第1期17-19,23,共4页
Polymer Materials Science & Engineering
关键词
微胶囊
相变材料
聚脲
硬脂酸丁酯
界面聚合
microcapsule
phace change material
polyurea
butyl stearate
interfacial polymerization
